The reason that graph A is the correct graph is because graph B decellerates when the ball speeds up and graph C skips distance when the ball speeds up.
The reason that graph D is the correct graph is because graph E shows that the ball is experienceing constant acceleration and then an increase in acceleration. Also, graph F shows a constant velocity, which is correct, but when the ball sped up, graph showed that the acceleration was constant and that the velocity keep increasing.
Lab 4 - Physlet
The reason that graph A is the correct graph is because graph B decellerates when the ball speeds up and graph C skips distance when the ball speeds up.
The reason that graph D is the correct graph is because graph E shows that the ball is experienceing constant acceleration and then an increase in acceleration. Also, graph F shows a constant velocity, which is correct, but when the ball sped up, graph showed that the acceleration was constant and that the velocity keep increasing.